West Coast Aviation Services Stormwater Outfall, Unalakleet, Alaska | USA

West Coast Aviation Services is a stormwater outfall located at 248 Airport Road in Unalakleet, Alaska, within the Nome Census Area. This facility manages stormwater runoff from aviation-related activities, operating under the United States Environmental Protection Agency's National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permit framework. As a stormwater outfall in a remote Alaskan community, it serves a small-scale catchment area typical of rural airport operations. The facility operates under the regulatory oversight of the US Clean Water Act, which requires stormwater discharges from industrial and municipal sources to obtain NPDES permits. In Alaska, the EPA directly implements the NPDES program for most areas, including Unalakleet. The outfall likely handles runoff from impervious surfaces such as runways, taxiways, and parking areas, with basic treatment through sedimentation or filtration before discharge. Environmental significance includes protecting the Unalakleet River and Norton Sound from potential contaminants like deicing fluids, fuel residues, and sediment. As a stormwater outfall in a remote region, it plays a key role in maintaining water quality for subsistence and recreational uses. The facility's compliance with MS4 permit requirements helps mitigate impacts on local aquatic ecosystems.

Unalakleet is located on the Norton Sound coast of the Bering Sea, in a subarctic climate with permafrost and seasonal snowmelt. Stormwater runoff from the airport can carry pollutants such as petroleum hydrocarbons, deicing chemicals, and sediment into nearby waterbodies. The Unalakleet River supports salmon runs and is vital for local subsistence fishing. Regulatory oversight under the Clean Water Act aims to prevent degradation of these waters from urban and industrial stormwater discharges.